FIR filter windowing methods

2 次查看（过去 30 天）
John
John 2013-12-2
评论： Wayne King 2013-12-2
Hi, I have a burning question want to ask.
Why windowing is not necessary if we have more than 100 coefficients for the FIR filter at a sampling rate of 0.1Hz?
Any hints and tips will be appreciated!

请先登录，再回答此问题。

回答（1 个）

Wayne King
Wayne King 2013-12-2
Can you be more specific? Are you talking about designing an FIR filter using the window method or applying a window to FIR filter coefficients.
The window method for FIR filter design typically begins with some idealized response, which has an infinite impulse response, truncating that response, and then applying a window to improve things like sidelobe behavior and enforce symmetry to ensure linear phase.
So what exactly are you having trouble with?
  2 个评论
John
John 2013-12-2
I do understand the steps of designing a FIR filter.
However my issue is if I'm given this problem on analog filter with impulse response h(t) = e−t2.
Which will be the design step can be omitted and why?
For me I think truncating the impulse response is not necessary. Am I right?
Wayne King
Wayne King 2013-12-2
If you want to design an FIR filter, you have to have a finite number of filter taps.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Filter Design 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by